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Answer: Cloud Data Loss Prevention with cryptographic hashing
The question requires anonymizing PHI in an irreversible manner where the output does not preserve the original character set or length. Cryptographic hashing is the only option that meets both criteria: it is a one-way function (irreversible) and produces a fixed-length hash output that bears no resemblance to the original data format. Options A and B (deterministic encryption and format-preserving encryption) are reversible with the proper keys. Option D (KMS-wrapped keys) still involves encryption, which is reversible. The community discussion strongly supports C with 100% consensus, noting that hashing is the only irreversible method among the options.
Author: LeetQuiz Editorial Team
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You need to anonymize protected health information (PHI) in an analytics system so that the process is irreversible and the output does not retain the original data's character set or length. Which Google Cloud solution should you use?
A
Cloud Data Loss Prevention with deterministic encryption using AES-SIV
B
Cloud Data Loss Prevention with format-preserving encryption
C
Cloud Data Loss Prevention with cryptographic hashing
D
Cloud Data Loss Prevention with Cloud Key Management Service wrapped cryptographic keys
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